Abstract
The consequences of the application of the laws of energy and momentum conservation in a general way (two-body kinematics) to the interpretation of recoil studies of high-energy nuclear reactions have been investigated. The particular example, ${\mathrm{Tb}}^{149}$ production by the irradiation of gold with 0.7- to 6.2-GeV protons as reported by Winsberg, is considered. Contrary to his conclusion that detailed information on the mechanism of this reaction could be obtained from such a procedure, we find that the application of two-body kinematics does not yield a unique solution and is of little help in determining the reaction mechanism of this and probably most other complex high-energy nuclear reactions.
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